.... A more appropriate way to distinguish between them has to do with the role attributed to cultural mediation. Mediation of human action by cultural artifacts played a central role in Vygotsky’s account of human development, but was much less important for Piaget. Claims regarding the social origins...

... or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements. Artifacts Categories Concepts...

... Artifacts Category development Identity Inference Internal structure Natural kinds Hum. Dev. 31: 28-34 (1988) Children s Expectations Concerning Natural Kind Categories1 Susan A. Gelman University of Michigan, Ann Arbor, Mich., USA Key Words. Artifacts Category development Identity Inference...

.... Artifacts Clusters Dichotomies Homeostases Natural kinds Nominal kinds Theories While the preceding papers illustrate a diverse set of views on concepts and concep­ tual change, they converge on one general question: Are there fundamental differences between types of concepts that have impor­...